I currently own a Vauxhall Corsa D, Design, 09 plate. Since the onset of the cold weather I have been experiencing issues with firstly condensation forming on all of the windows on the inside of the vehicle and secondly the windows constantly steaming up. It has got to the point where the windows will not demist even with the fans on full speed and obviously directed at the windscreen. I have already tried/checked the following:

1. Checked all areas of the inside of the vehicle for any damp patches with no trace.
2. Removed the dampness every night by wiping down all windows with a cloth and then removing the cloth from the vehicle every time.
3. Air con off and air con on does not improve the problem (I do not have air circulation on).
4. Coolant levels have not decreased over the past couple of weeks so there does not seem to be a leak there.
5. Pollen filter has been changed, which has had no effect on the problem.

I don't mean to sound rude but I just want to reinforce that the steaming/condensation issues are more than you would usually expect at any time of year. The problem practically makes the vehicle unusable, as no length of time with the fans on full speed will demist the windscreen.

Many thanks for taking the time to read my question and reply.